The Camassa-Holm (CH) equation, rediscovered by Camassa and Holm [1]} at the crepuscle of the last century, added a new member to the zoo of models describing waves in shallow water, such as the KdV [2]} and BBM [3]} equations. It was firstly reported (but not spotlighted) in the earlier 80's by Fokas and Fuchssteiner [4]}, and Fuchssteiner [5]}, see also the comments on [6]}, in the context of integrable equations.
